So you can do a table loop to show/hide a button per row? Say for instance in the image below the Remove from Cart button could be hidden if Install Req'd is Yes? (not a practical real world example but has the two elements we are talking about; a button shown in column and a cell to base the qualification on.)

I use a Set Fields to clear ($NULL$) the column value, which in turn clears the Button text (thus showing the base Button outline on an image), but I have also found that when using the Dev Studio you cannot directly find the table column (not one of the available selection options) as it is an image, but you can reference it by typing in the name of the column in the Set Fields.

You cannot use a Change Field Action as it will hide or show the whole column, not just the individual value that you want to set/clear (although the Guides do mention other settings to use to show/hide, etc, which I have found do not work as expected). Even with setting the column to say another image will still produce the outline as shown above - thus the differences on the "type" of Button to use.